Participants with an adequate number of autologous peripheral blood stem cells (PBSCs) collected by apheresis will be admitted to the study center for the administration of high-dose chemotherapy and autologous transplantation. After transplantation, the times to PMN, PLT, and lymphocyte engraftment will be measured. Participants will remain hospitalized until they achieve an absolute granulocyte count of >500/µl in the peripheral blood. Graft durability will be assessed at 100 days, and 6 and 12 months post-transplantation.